diff --git a/trunk/research/ts_info.cpp b/trunk/research/ts_info.cpp
index 4e92860eb..aa14eefd7 100755
--- a/trunk/research/ts_info.cpp
+++ b/trunk/research/ts_info.cpp
@@ -1958,152 +1958,6 @@ public:
 	}
 };
 
-class FlvMuxer
-{
-public:
-	int fd;
-	const char* file;
-	bool audio_sequence_header_writen;
-
-	FlvMuxer()
-	{
-		file = NULL;
-		fd = 0;
-		audio_sequence_header_writen = false;
-	}
-	
-	virtual ~FlvMuxer()
-	{
-		if (fd > 0) {
-			close(fd);
-		}
-	}
-
-	int open(const char* _file)
-	{
-		file = _file;
-		if ((fd = ::open(file, O_CREAT|O_WRONLY|O_TRUNC, 
-			S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH)) < 0 
-		) {
-			return -1;
-		}
-		
-		char header[] = {
-			0x46, 0x4c, 0x56, // FLV
-			0x01,  // version: 01
-			0x04, // 0x05:audio+video, 0x01:video, 0x04:audio
-			0x00, 0x00, 0x00, 0x09, // offset: always 0x09
-			0x00, 0x00, 0x00, 0x00 // previous tag 0: always 0
-		};
-		if (write(fd, header, sizeof(header)) != sizeof(header)) {
-			return -1;
-		}
-		
-		return 0;
-	}
-
-	/**
-	* @param size, if 0 for sequence header.
-	* @param sound_rate, Sampling rate. The following values are defined:
-	* 		0 = 5.5 kHz
-	* 		1 = 11 kHz
-	* 		2 = 22 kHz
-	* 		3 = 44 kHz
-	* @param sound_type, Mono or stereo sound
-	* 		0 = Mono sound
-	* 		1 = Stereo sound
-	*/
-	int write_audio(char* data, int size, u_int32_t timestamp, int sound_rate, int sound_type)
-	{
-		if (size > 0 && !audio_sequence_header_writen) {
-			audio_sequence_header_writen = true;
-			if (write_audio(NULL, 0, 0, sound_rate, sound_type) != 0) {
-				return -1;
-			}
-		}
-		
-		char tag_header[11];
-		char sequence_header[2]; // aac only
-		
-		int data_size = size + sizeof(sequence_header);
-		int tag_size = data_size + sizeof(tag_header);
-		
-		////////////////////////////////////
-		// 11bytes tag header.
-		////////////////////////////////////
-		// TagType
-		char* p = tag_header;
-		*p++ = 0x08; // audio
-		
-		// DataSize
-		char* pp = (char*)&data_size;
-		*p++ = pp[2];
-		*p++ = pp[1];
-		*p++ = pp[0];
-		
-		// Timestamp
-		pp = (char*)&timestamp;
-		*p++ = pp[2];
-		*p++ = pp[1];
-		*p++ = pp[0];
-		
-		// TimestampExtended
-		*p++ = pp[3]; 
-		
-		//StreamID
-		*p++ = 0;
-		*p++ = 0;
-		*p++ = 0;
-		
-		////////////////////////////////////
-		// 2bytes codec header for aac
-		////////////////////////////////////
-		// SoundFormat
-		sequence_header[0] = 0xa0; // aac
-		sequence_header[0] |= (sound_rate << 2) & 0x0c;
-		sequence_header[0] |= 0x02; // Compressed formats always decode to 16 bits internally.
-		sequence_header[0] |= sound_type & 0x01;
-		// AACPacketType
-		if (size == 0) {
-			sequence_header[1] = 0x00;
-		} else {
-			sequence_header[1] = 0x01;
-		}
-		
-		////////////////////////////////////
-		// 4bytes tag size
-		////////////////////////////////////
-		char tag_size_bytes[4];
-		p = tag_size_bytes;
-		pp = (char*)&tag_size;
-		*p++ = pp[4];
-		*p++ = pp[2];
-		*p++ = pp[1];
-		*p++ = pp[0];
-		
-		// write
-		if (write(fd, tag_header, sizeof(tag_header)) != sizeof(tag_header)) {
-			return -1;
-		}
-		if (write(fd, sequence_header, sizeof(sequence_header)) != sizeof(sequence_header)) {
-			return -1;
-		}
-		if (size > 0 && write(fd, data, size) != size) {
-			return -1;
-		}
-		if (write(fd, tag_size_bytes, sizeof(tag_size_bytes)) != sizeof(tag_size_bytes)) {
-			return -1;
-		}
-		
-		return 0;
-	}
-
-	int write_video(char* data, int size)
-	{
-		return 0;
-	}
-};
-
 class AacMuxer
 {
 public:
@@ -2150,7 +2004,7 @@ public:
 	}
 };
 
-int consume(TSMessage* msg, FlvMuxer* flv, AacMuxer* aac_muxer)
+int consume(TSMessage* msg, AacMuxer* aac_muxer)
 {
 	int ret = 0;
 	
@@ -2176,35 +2030,7 @@ int consume(TSMessage* msg, FlvMuxer* flv, AacMuxer* aac_muxer)
 		    }
 		    trace("ts+aac audio raw data parsed, size: %d, 0x%02x 0x%02x 0x%02x 0x%02x",
 		    	aac.size, aac.at(0), aac.at(1), aac.at(2), aac.at(3));
-		    
-		    int sound_rate = 0;
-		    if (aac.sampling_frequency_index == TSAacSampleFrequency22050) {
-		        sound_rate = 0x02;
-		    } else if(aac.sampling_frequency_index == TSAacSampleFrequency44100) {
-		        sound_rate = 0x03;
-		    } else {
-		         // 0 = 5.5 kHz
-		         // 1 = 11 kHz
-		         // others.
-		         trace("ts+aac flv donot support sample-rate: %d", aac.sampling_frequency_index);
-		         return -1;
-		    }
-		    
-		    int sound_type = 0;
-		    if (aac.channel_configuration == 1) {
-		        // 0 = Mono sound
-		        sound_type = 0;
-		    } else if (aac.channel_configuration == 2) {
-		        // 1 = Stereo sound
-		        sound_type = 1;
-		    } else {
-		         trace("ts+aac flv donot support channel: %d", aac.channel_configuration);
-		         return -1;
-		    }
-		    
-		    if (flv && (ret = flv->write_audio((char*)aac.raw_data, aac.size, msg->pts, sound_rate, sound_type)) != 0) {
-		        return ret;
-		    }
+		    // TODO: process audio.
 		}
     } else {
         // parse H264 video.
@@ -2222,21 +2048,19 @@ int consume(TSMessage* msg, FlvMuxer* flv, AacMuxer* aac_muxer)
 	return ret;
 }
 
-int main(int /*argc*/, char** /*argv*/)
+int main(int argc, char** argv)
 {
     const char* file = "livestream-1347.ts";
-    const char* output_flv_file = "livestream.flv";
-    const char* output_aac_file = "livestream.aac";
+    const char* output_aac_file = "output.aac";
+    if (argc > 2) {
+        file = argv[1];
+        output_aac_file = argv[2];
+    }
     
     int fd = open(file, O_RDONLY);
-    FlvMuxer flv;
     AacMuxer aac_muxer;
     
     int ret = 0;
-    if ((ret = flv.open(output_flv_file)) != 0) {
-        trace("flv+open open flv file failed.");
-        return ret;
-    }
     if ((ret = aac_muxer.open(output_aac_file)) != 0) {
         trace("aac_muxer+open open flv file failed.");
         return ret;
@@ -2280,7 +2104,7 @@ int main(int /*argc*/, char** /*argv*/)
 	            continue;
 	        }
 	        
-	        if ((ret = consume(msg, &flv, &aac_muxer)) != 0) {
+	        if ((ret = consume(msg, &aac_muxer)) != 0) {
 	            trace("demuxer+consume parse and consume message failed. ret=%d", ret);
 	            break;
 	        }